But in all seriousness, I think me means the C two ledger lines above the staff.
Maybe he calls the lines a "stack".

Is he...stupid?

Click to expand...

And here I thought my range was limited, I played a triple stack E yesterday, who knew.

But in all seriousness, the term ignorance sounds worse than stupid, but it's not. It merely means ignorant (uninformed) about something. How many years did I think G above High C was a double G? And, add to that, slang . . . think of the following:
Sticks - golf clubs
Lip trills often referred to as "shakes"
Gig - job, or performance
. . . countless others . . . My kids are always coming up with them, and often I am the one who is ignorant, as I have no idea what they are talking about.